Walking is the easiest and simplest form of exercise. By putting one foot in front of the other, you can start to walk your ways towards a healthier lifestyle. Walking is an easy way to challenge the cardiovascular system (心血管系统), while at the same time building muscles. But to achieve these goals, a little more than a gentle walk around the block is required.
Walking actually burns as many calories (卡洛里) as running the same distance —— if done in the correct manner and at a reasonable pace (步伐). Start with a basic program that you can complete three or four times a week. This should include five main steps:
——A beginning warm-up for about 5 minutes.
——A little bit faster period of 5 minutes at medium level (中等速度)
——A 10-minute “burning” at a high level.
——A 5-minute cool down period at a low level again.
——A suitable walking pace of around 5 kilomet
A. lose weight
B. avoid heart attacks
C. cure blood diseases
D. strengthen heart functions
The simplest way of putting an idea down on paper is to draw a picture. That was (61) men first began to write, six thousand years ago or more. All (62) scripts (文字) have been developed from picture-writing of (63) sort. The English alphabet we now use (64) to us over a long period of time from the (65) of ancient Egypt.
Picture-writing, called hieroglyphics (象形文字), could be used to express (66) as well as objects. (67) , a drawing of a man would (68) the object "man", while (69) of a man lying on the ground (70) a spear in him would mean the idea "death". Later, some drawings came to stand for sounds as well. (71) in Egyptian hieroglyphics the (72) of a house stood (73) for the object "house" and for the sound "pr", (74) in spoken Egyptian meant "house".
(75) the Egyptians, the Chinese and the American Indians
A. that
B. body
C. sight
D. such
我来回答: